值得注意的是PLC和DCS這些原來處于不同硬件平臺的系統(tǒng),正隨著計算技術、通信技術和編程技術的發(fā)展,趨向于建立同一硬件平臺,運用同一個操作系統(tǒng)、同一個編程系統(tǒng),執(zhí)行不同的DCS和PLC功能。這就是真正意義上的EIC三電一體化?;蛘哒fDCS和PLC的形態(tài)將會變化,而它們的功能依然存在。其中的關鍵技術應該是嵌入式PC系統(tǒng)及支持現(xiàn)場總線的I/O(硬件),以及以IEC 61161-3為基礎的編程系統(tǒng)及強實時(hard real-time)操作系統(tǒng)。
PLC在中國的發(fā)展
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CIRCUIT BREAKERS SQUARE D EDB34100 100A 3P EDB BREAKER
Circuit Breakers Square D EDB34040 40A 3P EDB Breaker
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16 Square D QOB120 20 amp breakers bolt on
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